To realize the envisioned 5G services, significant enhancement of per-user throughput and overall system capacity is required, compared with those of the
4G system. Such an enhancement can be achieved
through advanced PHY/MAC/network technologies
and efficient methods of cell deployment and spectrum management. In particular, utilizing a larger
amount of system bandwidth guarantees an increase in the capacity by allocating more frequency
resources to each user in the system. Therefore, utilizing the spectrum where huge bandwidth is available can be considered to be the most critical issue
for the 5G system.